1121112981 has 20 divisors (see below), whose sum is σ = 1681148832. Its totient is φ = 744552648.

The previous prime is 1121112953. The next prime is 1121112983. The reversal of 1121112981 is 1892111211.

It is not a de Polignac number, because 1121112981 - 2¹⁷ = 1120981909 is a prime.

It is a super-2 number, since 2×1121112981² = 2513788632333412722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121112983) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5011 + ... + 47616.

Almost surely, 2^1121112981 is an apocalyptic number.

It is an amenable number.

1121112981 is a deficient number, since it is larger than the sum of its proper divisors (560035851).

1121112981 is an equidigital number, since it uses as much as digits as its factorization.

1121112981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52902 (or 52893 counting only the distinct ones).

The product of its digits is 288, while the sum is 27.

The square root of 1121112981 is about 33483.0252665436. The cubic root of 1121112981 is about 1038.8427033479.

The spelling of 1121112981 in words is "one billion, one hundred twenty-one million, one hundred twelve thousand, nine hundred eighty-one".